﻿using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 仪表识别2
{
    class DrawTableControl
    {
        public class DrawTabControl
        {
            TabControl tabControl1 = null;
            Font font1 = null;
            public DrawTabControl() { }
            public DrawTabControl(TabControl tabcontrol, Font fo)
            {
                tabControl1 = tabcontrol;
                font1 = fo;
            }

            const int CLOSE_SIZE = 12;
      

            public void ClearPage()
            {

                //清空控件
                //this.MainTabControl.TabPages.Clear();
                //绘制的方式OwnerDrawFixed表示由窗体绘制大小也一样
                this.tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;
                this.tabControl1.Padding = new System.Drawing.Point(CLOSE_SIZE, 0);
                this.tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);
                this.tabControl1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.tabControl1_MouseDown);
            }

            private void tabControl1_DrawItem(object sender, DrawItemEventArgs e)
            {
                try
                {
                    Rectangle myTabRect = this.tabControl1.GetTabRect(e.Index);

                    //先添加TabPage属性   
                    e.Graphics.DrawString(this.tabControl1.TabPages[e.Index].Text, this.font1, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);

                    //再画一个矩形框
                    using (Pen p = new Pen(Color.Transparent))
                    {
                        myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                        myTabRect.Width = CLOSE_SIZE;
                        myTabRect.Height = CLOSE_SIZE;
                        e.Graphics.DrawRectangle(p, myTabRect);
                    }

                    ////填充矩形框
                    //Color recColor = e.State == DrawItemState.Selected ? Color.White : Color.White;
                    //using (Brush b = new SolidBrush(Color.Transparent))
                    //{
                    //    e.Graphics.FillRectangle(b, myTabRect);
                    //}

                    //画关闭符号
                    using (Pen objpen = new Pen(Color.Black))
                    {
                        ////=============================================
                        //自己画X
                        ////"\"线
                        Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3);
                        Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3);
                        e.Graphics.DrawLine(objpen, p1, p2);
                        ////"/"线
                        Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3);
                        Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3);
                        e.Graphics.DrawLine(objpen, p3, p4);

      
                    }
                    e.Graphics.Dispose();
                }
                catch (Exception)
                { }
            }

            private void tabControl1_MouseDown(object sender, MouseEventArgs e)
            {
                if (e.Button == MouseButtons.Left)
                {
                    int x = e.X, y = e.Y;
                    //计算关闭区域   
                    Rectangle myTabRect = this.tabControl1.GetTabRect(this.tabControl1.SelectedIndex);

                    myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                    myTabRect.Width = CLOSE_SIZE;
                    myTabRect.Height = CLOSE_SIZE;

                    //如果鼠标在区域内就关闭选项卡   
                    bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom;
                    if (isClose == true)
                    {
                        this.tabControl1.TabPages.Remove(this.tabControl1.SelectedTab);
                    }
                }
            }

        }
    }
}
